الفهرس 
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Abstract
This study examined the effect of different surface chemical
treatment and heat treatments on the durability and hydrolysis resistance
of the resin- zirconia bond.
The groups of comparison were, silica coating (gp 1&6), silica
coating + MDP primer “Z-prime plus” (gp2&7), silica coating + MDP +
heat ttt (gp 3&8), silica coating + MDP + hydrophobic coating (gp 4&9),
silica coating + MDP+ hydrophobic coating + heat treatment X2 (gp
5&10)
The SBS of the groups was tested using an INSTRON® universal
testing machine, and the data was collected using BlueHill universal
INSTRON ENGLAND® software.
The bonding surfaces (post failure) were scanned using an
electronic microscope at a magnification of X40 pre and post aging.
Within the limitations of this study it was concluded that:
1) Aging of the Zirconia ceramics had a significant negative effect on the SBS.
2) There was a positive correlation (with no significance) between applying heat treatment to the MDP treated groups and achieving higher SBS, the heat treated
groups came superior pre and post aging followed by the MDP treated group with
no heat treatment 68
3) Heat treatment protected the bond from water degradation as the heat treated groups had the highest numbers of samples with mixed failure in the post aging group 4) Applying a hydrophobic coating did not improve the SBS.